Montana · Hiking

Petty Mountain

11.6 mi
round trip
1,013 ft
climb
7,269 ft
high point
Out and back
route

Is Petty Mountain open right now?

Alert in the area

The Forest Service lists an alert for Lolo National Forest.

  • East Fork Big Creek Road & Trail Closure- Superior Ranger District

    Agency alert covering Lolo National Forest · Order 26-003- · USFS · Lolo National Forest

As of · Source: USFS · Lolo National Forest. Agencies don't list every closure — check before you go.

Petty Mountain is a hard out-and-back hike in the Ninemile Ranger District of Montana's Lolo National Forest, managed by the Forest Service. The trail runs about 11.6 miles and rises about 1,013 feet from its low point of 5,277 feet to the high point of 7,269 feet. Bikes are allowed on the trail, and the surface is natural. The hike is open year-round. Several shorter trails sit close by. Albert-Petty Tie is about 0.3 miles away, and Albert Creek is about 1.2 miles away. Petty Pasture is about 2.8 miles away, and the Bighorm interpretive trail is about 4.1 miles away.

Local outfitters

Not on Roamze yet. Their page has how to reach them.

Route details

Distance
11.6 mi round trip
Climbing
About 1,013 ft
Starts at
ALBERT TRAILHEAD (about 5,489 ft)
Summit
7,275 ft
Difficulty
Hard
Time
About 4.5 hours

Getting there

Park at ALBERT TRAILHEAD.

Season

Season: Year-round.

Questions about this route

How long is the Petty Mountain on Petty Mountain?

About 11.6 mi round trip from ALBERT TRAILHEAD (about 5,489 ft).

How much elevation gain is on the Petty Mountain?

About 1,013 ft of climbing round trip.

How hard is the Petty Mountain?

It is rated hard.

Where does the Petty Mountain start?

ALBERT TRAILHEAD (about 5,489 ft).

How long does the Petty Mountain take?

About 4.5 hours round trip.

When is the best time for the Petty Mountain?

Year-round.

Conditions and forecast on Petty Mountain

Daily highs and lows, wind and the chance of precipitation at the summit and route start for the next 7 days, from the Open-Meteo model.